J. Lötsch

Publications320
h-index65
Citations12,784
Highly Influential Citations422
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GTP cyclohydrolase and tetrahydrobiopterin regulate pain sensitivity and persistence
We report that GTP cyclohydrolase (GCH1), the rate-limiting enzyme for tetrahydrobiopterin (BH4) synthesis, is a key modulator of peripheral neuropathic and inflammatory pain. BH4 is an essential…
Pharmacokinetics of codeine and its metabolite morphine in ultra-rapid metabolizers due to CYP2D6 duplication
TLDR
CYP2D6 genotypes predicting ultrarapid metabolism resulted in about 50% higher plasma concentrations of morphine and its glucuronides compared with the EM, and it might be good if physicians would know about the CYP2D 6 duplication genotype of their patients before administering codeine.
Importance of IL28B gene polymorphisms in hepatitis C virus genotype 2 and 3 infected patients.
Ziconotide for treatment of severe chronic pain
Analgesic effects of morphine and morphine‐6‐glucuronide in a transcutaneous electrical pain model in healthy volunteers
Our objective was to quantify the extent and time course of the effects of morphine‐6‐glucuronide and morphine on pain threshold, pain tolerance, pupil diameter, and side effects.
Olfactory function in mild cognitive impairment and Alzheimer's disease: an investigation using psychophysical and electrophysiological techniques.
TLDR
Investigations of larger study groups with detailed cognitive examination and postmortem diagnosis may resolve the intriguing possibility of early diagnosis and discrimination of Alzheimer's disease subtypes through chemosensory event-related potentials in addition to existing biomarkers.
Quick Discrimination of Adelta and C Fiber Mediated Pain Based on Three Verbal Descriptors
TLDR
A three-item verbal rating test using the words “pricking’, “dull”, and “pressing” may provide sufficient information to characterize a pain sensation evoked by a physical stimulus as transmitted via Aδ or via C fibers.
The polymorphism A118G of the human mu-opioid receptor gene decreases the pupil constrictory effect of morphine-6-glucuronide but not that of morphine.
TLDR
The A118G SNP in the mu-receptor gene significantly reduces the potency of M6G in humans, and the concentration-response relationship of morphine was not affected by this specific SNP.
Are mu-opioid receptor polymorphisms important for clinical opioid therapy?
Pharmacokinetics of Opioids in Liver Disease
TLDR
Although glucuronidation is thought to be less affected in liver cirrhosis, the clearance of morphine was found to be decreased and oral bioavailability increased, and the disposition of a few opioids, such as fentanyl, sufent anil and remifentanil, appears to be unaffected in liver disease.
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